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1. We inhale oxygen when we breathe and exhale carbon dioxide. What is the oxygen used for and where does the carbon dioxide come from?

2. What is the overall purpose of the light reactions in photosynthesis?

3. Why are carnivores, such as lions, dependent on photosynthesis to survive?

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Beverley Smith
Beverley SmithLv2
8 Dec 2018

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Related questions

Which of the following is not a product of the light reactions of photosynthesis?

oxygen

ATP

sugar

NADPH

All of the following colors of light are used for photosynthesis except

orange

green

violet

blue

If you are heterozygous for sickle-cell anemia, you will be more likely to get malaria.

True

False

Asexual reproduction produces genetically identical individuals because

cell division occurs only in meiosis

no meiosis or fertilization take place

chromosomes do not have to replicate during asexual reproduction

it involves chromosome replication without cytokinesis

Animals inhale air containing oxygen and exhale air with less oxygen and more carbon dioxide. Plants use the carbon dioxide to make

ATP

water

oxygen

sugar

When does crossing over occur?

prophase I

metaphase I

prophase II

anaphase I

Question 1 The membrane structures inside the chloroplast are called the ______, while the fluid surrounding the stacks of membrane is called the ______.
a. stroma; thylakoid
b. thylakoid; cytosol
c. thylakoid; stroma
d. thylakoid; matrix
e. matrix; thylakoid

Question 2 What is considered the ultimate source of energy for living things on Earth?
a. the sun
b. electrons
c. green plants
d. oxygen
e. ATP

Question 3 Why do most plant leaves appear green?
a. They contain a lot of starch which has a green color.
b. They have chloroplasts which absorb green light for photosynthesis.
c. During the light reaction phase carbon dioxide is converted to oxygen which emits green light.
d. They have chloroplasts which absorb all colors of light except for green, which is reflected.
e. During the dark reaction phase water is converted to oxygen which emits green light.

Question 4 Plants perform only photosynthesis, not respiration. True False

Question 5 What is the primary purpose of the light reactions of photosynthesis?
a. to create oxygen gas
b. to produce glucose
c. to convert solar energy to chemical energy (in the form of ATP and NADPH) to power the dark reactions
d. to remove carbon dioxide gas from the atmosphere
e. to create water

Question 6 The light dependent reactions occur in the:
a. mitochondrial membrane.
b. mitochondrial matrix.
c. stroma.
d. thylakoid membrane.
e. cytosol.

Question 7 The energy to run the dark reactions of photosynthesis is produced _________.
a. by the CO2 initially used in the dark reactions.
b. during glycolysis
c. during the light reaction phase
d. during the Krebs cycle
e. during anaerobic respiration

Question 8 Which of the following substances could be totally eliminated and not interfere with the process of photosynthesis?
a. O2
b. H2O
c. light
d. CO2

Question 9 What product(s) do plants produce during photosynthesis that is/are used by humans and other animals?
a. carbon dioxide
b. carbon dioxide and water
c. glucose and oxygen
d. glucose
e. oxygen

Question 10 Only plants can carry out photosynthesis. True False

Question 11 During the light reactions of photosynthesis, ...
a. oxygen is produced from H2O.
b. glycolysis occurs.
c. the Krebs cycle occurs.
d. CO2 is combined into glucose.
e. ATP is broken down to ADP + P

Question 12 The reactants of photosynthesis are:
a. sugar.
b. sugar and water.
c. O2 and CO2
d. O2 and sugar.
e. CO2 and water.

Question 13 During the dark reaction phase of photosynthesis in plants...
a. ATP is created.
b. H+ ions are moved into the stroma from the matrix.
c. molecules of CO2 are combined into sugar.
d. H2O is split into oxygen and H+.
e. solar energy is converted to chemical energy.

6. When homologous chromosomes pair up in meiosis, this is called:

a. replication.
b. synapsis.
c. cytokinesis.
d. segregation.

7. Energy that is stored is called:

a. potential energy.
b. thermodynamic energy
c. activation energy.
d. kinetic energy.

8. The O2 that we inhale when we breathe:

a. is used in the mitochondria in aerobic cellular respiration.
b. All of the above are true of the O2 we inhale.
c. acts as the terminal electron receptor at the end of aerobic cellular respiration.
d. may be produced by plants through photosynthesis.

9. Photosynthesis is the process by which:

a. carbon dioxide is synthesized.
b. glucose is synthesized.
c. plants burn energy.
d. glucose and other molecules are broken down.

10. If there is no oxygen available for a eukaryotic cell, which of these chemical reactions involved in cellular respiration will take place?

a. the Krebs Cycle.
b. glycolysis.
c. all three can occur without oxygen.
d. the electron transport chain.

11. Eukaryotic chromosomes:

a. all of the above
b. contain DNA.
c. contain the recipe for the proteins needed for life.
d. contain genes.

12. The diploid (2N) number of chromosomes in humans is 46. The number of chromosomes found in a human sperm cell is:

a. 46
b. the haploid number cannot be determined from the information given
c. 92
d. 23

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